Where: Sudeley Castle, Winchcombe

When: Saturday, February 15, to Sunday, February 23

Cheltenham is home of the acclaimed intelligence centre GCHQ, so it's no surprise that one of the area's leading family attractions, Sudeley Castle, has designed a brand-new spy themed activity for February half-term visitors.

Running daily from February 15 to 23, the highly anticipated 'Sudeley Spies' is an exciting trail of clues, codes and riddles hidden throughout the mysterious castle rooms.

On arrival at the dedicated Visitor Centre, children can pick up a discovery sheet and while exploring the castle, use the items they find along the way to try to decode seven specially designed clues.

Each clue is different; discover codes written in hieroglyphics, Morse Code, and even nautical flags and more. As soon as children have solved each clue, the answers will spell out a super-secret password, which can be used back at the Visitor Centre to receive a small surprise!

Once you've used all your detective skills to complete the trail, there's so much more to explore at Sudeley Castle, including an adventure playground and fun fort that's perfect for a runaround with friends. Pack your wellies to splash in muddy puddles, explore the gardens and grounds or simply revel in the historic surroundings of the stunning Cotswold castle.

Kim Gibbon, head of visitor services, said: "February half term is the first school holiday of the year and Sudeley Spies is a family-friendly way to engage children and young people with a problem-solving day out, plus lots of outdoor space to explore.

"Our new February mystery trail is also a great way to explore the castle brimming with history, intrigue and, of course, lots of fun.

"Sudeley is a great day out for all ages, come rain or shine, with our array of magical gardens, historic royal residence, collection of rare pheasants and historic exhibition."

Sudeley Spies is included in the ticket price for February half term, and families can save an extra 20% on admission by booking in advance online - with children under three being admitted free.